When the reinforcement is in to the concrete everything is ok. But I need some part of reinforcement to be out of concrete. At that time the outer part has not no displacement and no stresses.Thanks for helping.
I partially agree with what Dr Fernando said. Whether the reinforcement will experience stress or not depends on which of the reinforcement is linked with within the beam. if it is the primary tensile reinforcement which resists the bending moment, definitely portion of the stress will be transferred to the reinforcement though it is outside the beam.
Using carbon fiber bands attached axialy in the bottm part of the beam, will hekp to you. Sika (brach) have some products like that.
Is the reinforcement externally connected or any external load is acting on the reinforcement outside the beam. If no, then there will be no stress in the reinforcement outside the beam, except that those induces due to its own self weight.
Carbon fiber strands fixed with epoxy resin is your solution
in real i want to retrofit the masonry arch with truss then i need something like this beam .. i modeled masonry arch using SOLID65 and truss body using beam188 and reinforcement usin link180 ... for connecting reinforcment i used CPINFT command. because the above problem i dont let reinforcment come out of masonry .. and i connect the truss element to reinforcement by beam connection in WB .. but i got convergence errors ...
To model a carbon fiber plate you can model as a plate under the beam, with the mechanical properties of the fiber. In addition you can use the carbon fiber plate without any beam to reinforce the structure. An the model could be easier and the solution cheaper
I think a better construction technique here would be ---Construction of hybrid section at the end of the beam by using steel plate bolted with the concrete section. Instead of tension bars protruding out from ends, better provide bolts coming out from the beam and connecting them with the steel plate. The plate can be connected with the truss as you planned. Thanks
It is not clear what you want to achieve. If you have the intention to fix something to the beam in a later stage then your method is not good. Rebars not embedded in concrete will corrode. You need stainless steel (see attachement).
The best method to fix something to a concrete beam in a later stage is to use stainless steel anchorbolds (type hilti) or to use stainless steel threaded rebars (zie foto)
I agree with u Mr.Bhagwanjee Jha .. but i need to model this method in ansys ! how can i connect line body to solid body ? this may have converge problems in nonlinear analysis !!!
thank u Mr.Pieter Baekeland .. i mentioned my target in some previous cm .. this wat is amazing .. but i need to model and verify this on the historical masonry arch !! so my problem is now the modeling and verifying .. thanks .
I do agree with Pieter Baekeland. It is never advised to extend the rebar out of concrete structucture as it can be a major source of corrosion which may not be observed in the begining but may cause a major failure at a later stage. Avoid it as far as possible.
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